the.com/password entropy
the math that tells you 'password123' is basically a welcome mat.
means a measure of how unpredictable a password is, calculated from its length and the size of the character pool it draws from.
from borrowed from thermodynamics and information theory, where entropy measures disorder or uncertainty; claude shannon repurposed it in 1948 to quantify information, and security folks later applied it to guessing how hard a password is to crack.
unitmeasured in bits, more bits means more guesses needed
length beats complexityfour random words often outscore p@ssw0rd!
brute force matheach added character multiplies cracking time exponentially
human weaknesspeople pick patterns, wrecking theoretical randomness